Svetlana Kalisetskaya, chairman of polling committee, playfully salutes inside a voting station after completing preparations for Sunday’s referendum at a polling station in Perevalne, Ukraine, Saturday, March 15, 2014. Tensions are high in the Black Sea peninsula of Crimea, where a referendum is to be held Sunday on whether to split off from Ukraine and seek annexation by Russia.(AP Photo/Vadim Ghirda)